Valve.



No. 861,039. PATENTED JULY 23, 1907.

- T. F. MAOMULLBN.

VALVE.

APPLIOATION 11.31) SEPT. 12, 1906.

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TRUMAN F. MACMULLEN, OF MARYD, PENNSYLVANIA.

VALVE.

Specification of Letters Patent.

Patented. July as, 1907.

Application filed September 12, 1906. Serial No. 334,341.

To all 'whom it may concern:

Be it known that I, TRUMAN F. MACMULLEN, a citizen of the United States, residing at Maryd, in the county of Schuylkill and State of Pennsylvania, have invented new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves and one of the principal objects of the same is to provide an automatically acting valve which can be adjusted to be operated at different fluid pressures.

Another object is to provide a spring seated valve and to provide means whereby the spring may be adjusted to the required tension to be operated by varying pressures.

Still another object of my invention is to provide an adjustable spring seated valve which can be used to advantage as a feed water regulator for boilers or for other purposes in which an automatic valve is desired to be operated by varying pressures. Y

The foregoing objects and others may be attained by means of the construction illustrated in the accompanying drawing, in which:

Figure 1 is a side elevation of my automatic valve connected up to a boiler for use as a feed water regulator. Fig. 2 is a sectional view through the valve. Fig. 3 is a sectional view showing, in detail, the sliding valve and its seat. Fig. 4 is a plan view of the top plate for covering the valve casing. Fig. 5 is a similar view of the disk for adjusting the tension of the spring in the valve casing.

Referring to the drawing for a more particular description of the invention, the numeral 1 designates a pipe section forming a casing for the valve, said pipe section having a hollow cylinder or casing 2 extending therefrom. The pipe section 1 is provided with a partition 3 extending from one endthereof to a point about midway of the pipe section 1 and providing an upper chamber 4 and a lower chamber 5. The back wall 6 of the partition 3 is inclined and joins the cylinder 2, as shown in Fig. 2 of the drawings: A sliding gate valve 7 is mounted to move in guides 8 formed within the pipe section 1, said guides terminating at their upper ends in squared shoulders'9, Fig. 3, to form stops for a piston head 10 fitted to the cylinder 2. A piston rod 11 extends through the casing 2 and the piston 10 is secured to said rod by means of a stop nut 12 and a lock nut 13, said nuts being located upon opposite sides of the piston 10 as shown in Fig. 2. The rod 11 extends below the piston 10 and its terminal end 14 is secured to the upper edge of the sliding valve '7 by means of a nut 15. A spring 16 of spiral form encircles the rod 11 and the lower end of said spring bears against the piston 10 while the upper end of said spring is secured to a disk 17 mounted to slide in the casing 2, said disk 17 having openings 18 therein and perforations 19 for adjusting bolts 20, said bolts having enlargements to bear upon the upper surface of said disk. The rod 11 passes through the disk 17 and through a cap or cover plate 21, Fig. 4, said cover plate having a series of openings 22 therein and a line of perforations 23, the center one of which is provided for the rod 11 while the two outer perforations are threaded to permit the adjustment of the bolts 20.

When my valve is connected up for use as a feed water regulator for boilers, the partitioned end of the pipe section 1 is connected to the boiler a and the tension ofthe spring 16 is adjusted by means of the bolts 20 to the required pressure at which the boiler is to be fed. When this pressure is exceeded, steam entering the chamber 4 will move the piston 10 upward and lift the valve 7 from its seat, thus opening the chamber 5 and placing it in communication with the pipe 24 which is provided with a branch .water pipe 25 through which water flows to the boiler a, suitable check valves 26, 27, being provided to prevent back pressure. The pipe 24 leads back to the boiler 11, and

a cock in said pipe is opened to equalize the pressure in pipe'24 when water is to be fed through pipe 25 to the boiler, the pressure through pipe 25 then being sufficient to inject water into the boiler. When the Water rises to a certain level to reduce the steam pressure, the tension of spring 16 will close the valve 7. The disk 17 and the cap plate 21 are provided with apertures 18 and 22 to permit an excessive pressure of steam to escape through an exhaust pipe 28.

When my device is intended to be used in connection with a water tank, the partitioned end of the pipe section 1 is connected to the tank and when the pressure of water within the tank is sufiicient to overcome the tension of spring 16, the valve 7 is operated to permit the water to flow through chamber 5 and out through the discharge opening in section 1 of the pipe, as will be understood.

From the foregoing it will be obvious that a valve constructed in accordance with my invention may be used to advantage for various purposes where difference in pressure is required to automatically operate a valve.

Having thus described the invention,- what 1 claim 1. An automatic spring seated valve comprising a partitioned pipe section a cylinder extending therefrom, a piston in the cylinder, :1 piston rod extending through the piston, a gate valve secured to said piston rod, a spring surrounding the rod and bearing against the piston, a disk in said cylinder to which said spring is secured, adjusting bolts bearing against said disk and a cap plate provided with threaded openings for said bolts.

2. A spring seated valve comprising a partitioned pipe section, a cylinder connected thereto, a piston in the cylinder, a piston rod passing through the piston, a sliding valve connected to said piston rod, guideways for said sliding valve, the upper ends of said guides providing TRUMAN F. MACMULLEN.

Witnesses:

A. G. NESBIT, SAML. MACMULLEN. 

